Modeling the westward transversal current in the southern Yellow Sea entrance: a case study in winter 2007
Modeling the westward transversal current in the southern Yellow Sea entrance: a case study in winter 2007
复制标题
南黄海入口西向横流模拟：2007 年冬季的案例研究
DOI：
10.1007/s10236-020-01361-9
复制
发表时间：
2020-04-03
期刊：
影响因子：
2.3
通讯作者：
Chu, Qinqin
中科院分区：
文献类型：
--
作者：
Ding, Yang;Bao, Xianwen;Chu, Qinqin
2007 年冬季，利用数值海洋模型对黄海南部入口处的西向横流（TC）进行了研究。凸显了热带气旋西进的三维结构和动态。模式模拟的月平均海流场显示，强西进的TC仅限于上层水体（浅于50 m），并从126° E向西延伸至124° E。动量平衡分析表明，西进的TC主要受准地转平衡的调节。海面高程相关的正压压力梯度力和密度相关的斜压梯度力共同控制了热带气旋西行的强度和方向。针对潮汐和风的敏感性模型实验表明，忽略潮汐时西行热带气旋增强，排除风时西行热带气旋大幅减弱。还进行了拉格朗日粒子追踪实验，研究黄海暖流与锋区西行热带气旋的关系。黄海暖流的水体特征受锋区水体性质的影响，尤其是次表层和下层水体性质的影响。西向热带气旋可能成为连接锋区与沿黄海槽西部流动的黄海暖流的重要桥梁。
The westward transversal current (TC) in the southern Yellow Sea entrance was investigated during winter 2007 using a numerical ocean model. The three-dimensional structures and dynamics of the westward TC were highlighted. The model-simulated monthly mean current fields showed that the strong westward TC was limited to the upper water column (shallower than 50 m) and extended westward from 126° E to 124° E. Momentum balance analysis indicated that the westward TC was mainly regulated by a quasi-geostrophic balance. Both the sea surface elevation–related barotropic pressure gradient force and the density-related baroclinic pressure gradient force controlled the intensity and direction of the westward TC. Sensitivity model experiments focusing on tide and wind demonstrated that the westward TC was intensified when tide was ignored and was greatly weakened when wind was excluded. Lagrangian particle tracking experiments were also performed, to investigate the relationship between the Yellow Sea Warm Current and the westward TC in the frontal region. The characteristics of the water in the Yellow Sea Warm Current were affected by the properties of the water in the frontal zone, especially in the sub-surface and lower layers. The westward TC might act as an important bridge, connecting the frontal zone with the Yellow Sea Warm Current flowing along the western Yellow Sea trough.